TOAZOE Professional Aluminum Alloy Quick Shoe Plate Adapter with 1/4 3/8 inches Screw for DSLR Camera Camcorder Tripod Monopod,Compatible with Manfrotto 501HDV 503HDV 701HDV 577/519/561/Q5 3/8" Mounting screw for attachment to ball heads. 1/4" and 3/8" threaded holes for mounting Dual bubble levels and safety catch. Can be used with tripod, rail, stabilizer and different devices, for Photography. Fast switching between different devices without replaceing the quick release assembly.